import java.util.Scanner;
/**
 * Created with Intellij IDEA.
 * Description:
 * User: 86135
 * Date: 2023-04-18
 * Time: 20:39
 */

public class Transformation {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < s.length(); i++) {
            char ch = s.charAt(i);
            if (ch >= 65 && ch <= 90) {
                ch += 32;
            }
            sb.append(ch);
        }
        System.out.println(sb.toString());
    }
}
